Soldering tool



July 25, 1950 J. H. FAUDREE ETAL SOLDERING TOOL Filed Aug. 13, 1946INVENTORS 1055 #5400142":- l fm/vc/s C flap:- BY

W A RNEY Patented July 25, 1950 SOLDERING. TOOL Joseph H. Faudree,-Flushing, and FrancisC. Dupre, St. Albans, N. Y.

Application August 13, 1946, Serial 'No. 690,216.

3 Claims.

This invention relates to a tool for effecting soldering, brazing,welding or cutting operations on a conductive material and'has for itsobject the provision of an improved form of readily manipulable handtool of thisconstruction utilizing a carbon electrode for contact withthe workpiece.

Another'obiect of the invention is theprovision ofga tool embodyingapairof-electrodes at least one of which is of carbon with at least oneof the electrodes spring loaded and movable relative to the main bodyportion of the tool to facilitate contact of the electrodes with thework.

Other objects and features of the invention will be readily apparent tothose skilled in the art from the specification and appended drawingsillustrating certain preferred embodiments in which:

Figure 1 is a View partly in section and partly in elevation of thetool.

Figure 2 is a transverse sectional view on the line 11-11 of Figure 1.

Figure 3 is a transverse sectional view on the line III-III of Figure 1.

Figure 4. is a transverse sectional view on the line IVIV of Figure 1.

The main body portion of the tool is formed by two conducting halves Iand 2 of semi-cylindrical form separated by a sheet 3 of insulation suchas mica. Integral with the portions I and 2 are fins 4 serving as aradiator reduce the heat transmitted to the handle from the electrodes.Above the fins 4, the body portions I and 2 are threaded as at 5 toreceive an insulatin handle portion 6 of hollow cylindrical form whichhas rigidly mounted therein a bushing I threaded on the tool. Aninsulating shield 8 is disposed between the handle 6 and the fins 4. Theelectrical conductors 9 enter the hollow handle 6 through the end cap IIand are provided with connectors I2 at their ends which are individuallyconnected to the body portions I and 2 by the studs I3. The body portionis held together by a clamp It insulated from the conducting halves andby the bushing I.

As specifically illustrated in the drawing, the lower ends of the bodyportions I and 2 are provided with longitudinal openings in which aredisposed electrodes I4 and I5. Electrode 14' is loaded for externalmovement by a spring I6 but its extended position is limited by a flatface screw I! which rides in a slot I8 to also prevent turning of theelectrode. The contact end of the electrode I4 is provided with a guideshoe I9 adapted to engage the work. The electrode I5 is rigidly mountedwithin the body portion 2 by the set screw 2 I drawing,

. In the form illustrated: in the and/or relatively high contactresistance. Theshoe I9 is to indicate to the op erator where theelectrode I5 will contact the. work and it will, of course, beunderstood that.

purpose of the this shoe may be omitted and also that the electrode I4may be formed of a material similar to the electrode I5 if desired.

In the operation of the form of the tool specifically shown in thedrawings, the conductors 9 are connected to a suitable source ofelectrical energy and the tool advanced to the work with the shoe I9 ofelectrode I4 first engaging the work to establish contact therewith. Asthe tool is further advanced toward the work, the electrode I4 movesrelatively to the body portion of the tool as the spring I6 iscompressed until the electrode I5 engages the work to complete thecircuit. The maximum heating will be efiected at the work surfaceengaged by the carbon or high resistance electrode I5 due to the contactresistance between the electrode and the work and also from the heatgenerated in the electrode itself by the passage of current.

With suitably formed electrodes and the selection of the proper materialtherefor, the tool is adapted for soldering, brazing, welding, burningor cutting a workpiece.

While certain preferred embodiments of the invention have beenspecifically disclosed, it is understood that the invention is notlimited thereto, as many variations will be readily apparent to thoseskilled in the art and the invention is to be given its broadestpossible interpretation within the terms of the following claims.

What is claimed is:

1. A tool of the class described comprising an elongated conducting bodyportion formed of two longitudinally extending halves joined togetherwith insulation therebetween, a handle provided at one end or" said bodyportion, a rod like electrode extending from the other end of each ofthe halves of said body portion, one of said electrodes being rigidlymounted, the other of said electrodes being springloaded and movablerelative to said body portion, said other of said electrodes in itsextended position terminating beyond the end of said rigidly mountedelectrode so as to engage the work under the bias of its spring loadingprior to the engagement of the rigidly mounted electrode with the workto complete the circuit.

2. A tool of the class described comprising an the electrode I l and theshoe I 9 are. formed of a relatively good conducting material,

elongated conducting body portion formed of two longitudinally extendinghalves joined together with insulation therebetween, a handle providedat one end of said body portion, a rod like electrode extending from theother end of each of the halves of said body portion, one of saidelectrodes being rigidly mounted, the other of said electrodes beingspring loaded and movable relative to said body portion, said other ofsaid electrodes in its extended position terminating beyond the end ofsaid rigidly mounted electrode so as to engage the work under the biasof its spring loading prior to the engagement of the rigidly mountedelectrode with the work to completethe circuit,

said other of said electrodesterminating' in a contact shoe for engagingthe work with the contact shoe formed to provide a clearance throughwhich is indicated on the work the point being spring loaded and movablerelative to said 4 body portion, said other of said electrodes in itsextended position terminating beyond the end of said rigidly mountedelectrode so as to engage the work under the bias of its spring loadingprior to the engagement of the rigidly mounted electrode with the workto complete the circuit, said other of said electrodes terminating in acontact shoe for engaging the work with the contact shoe formed toprovide a clearance through which is indicated on the work the point of.engagement of said rigidly mounted electrode therewith, said other ofsaid electrodes and contact shoe being formed of a material of goodconductivity and said rigidly mounted electrode beingformed of aresistive material having a relatively high contact resistance.

JOSEPH H. FAUDREEL FRANCIS C.DUPRE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Da'te 1,862,653 Bean June 14, 19322,045,523 Fassler June 23, 1936 2,272,968 Dyer Feb. 10, 1942 2,295,195Barnum Sept. 8, 1942

